Impeller for centrifugal blower
AssigneeMaruyama Mfg. Co., Inc.
InventorsKazuhiro Yoshida, Junichi Miyamoto
Life of this patent
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Abstract
An impeller 10 for a centrifugal blower 3 is of a closed type and comprises a first molded part 18 and a second molded part 20. The first part is formed by integrally molding a side plate 14, vanes 16, and a circular base 26 having a smaller area than a central opening 22 formed in the side plate. The second part acts as a main plate 12, having a boss section 24 formed with a recess section 30 into which the circular base is fitted. The impeller can be formed by joining the first and second parts together to form a single body, by fastening both of the circular base and the boss section to the rotating shaft 8 of a drive source 4 in a state where the circular base is fitted into the recess section.
Claims3
An impeller (10) for a centrifugal blower (3) including a main plate (12) adapted to be attached to a rotating shaft (8) of a drive source (4), a side plate (14) disposed coaxially at a predetermined interval with respect to said main plate (12), said side plate (12) having a central opening (22) formed therein, and a plurality of vanes (16) disposed at equally spaced intervals in the circumferential direction between said main plate (12) and said side plate (14), said impeller (10) comprising:
- a first molded part (18) including said side plate (14), said vanes (16) and a fitting section (26), and molded into a single-piece, said fitting section (26) having a smaller area than said central opening (22) of said side plate (14) and provided on the free edges of said vanes (16) on the side opposite to said side plate (14) in a coaxial relation to said side plate (14);
- and
- a second molded part (20) molded into a single-piece, said second molded part (20) constituting said main plate (12) and having a boss section (24) provided in the center thereof, said boss section (24) being adapted to couple with the rotating shaft (8) of the drive source (4) and having a recess section (30) formed therein into which said fitting section (26) is fitted;
- wherein said first molded part (18) and said second molded part (20) are integrated into a single body by fastening said fitting section (26) to said boss section (24) in a state where said fitting section (26) is fitted into said recess section (30).
Dependencies are inferred from the claim text.